CVE-2022-23538: User credentials leaked to third-party service via HTTP redirect in scs-library-client
First published: Tue Jan 17 2023(Updated: )
github.com/sylabs/scs-library-client is the Go client for the Singularity Container Services (SCS) Container Library Service. When the scs-library-client is used to pull a container image, with authentication, the HTTP Authorization header sent by the client to the library service may be incorrectly leaked to an S3 backing storage provider. This occurs in a specific flow, where the library service redirects the client to a backing S3 storage server, to perform a multi-part concurrent download. Depending on site configuration, the S3 service may be provided by a third party. An attacker with access to the S3 service may be able to extract user credentials, allowing them to impersonate the user. The vulnerable multi-part concurrent download flow, with redirect to S3, is only used when communicating with a Singularity Enterprise 1.x installation, or third party server implementing this flow. Interaction with Singularity Enterprise 2.x, and Singularity Container Services (cloud.sylabs.io), does not trigger the vulnerable flow. We encourage all users to update. Users who interact with a Singularity Enterprise 1.x installation, using a 3rd party S3 storage service, are advised to revoke and recreate their authentication tokens within Singularity Enterprise. There is no workaround available at this time.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sylabs Singularity Container Services Library | =1.3.2 | |
| Sylabs Singularity Container Services Library | =1.3.3 | |
| Sylabs Singularity Container Services Library | =1.4.0 | |
| Sylabs Singularity Container Services Library | =1.4.1 |
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Reference Links
- https://github.com/sylabs/scs-library-client/commit/68ac4cab5cda0afd8758ff5b5e2e57be6a22fcfa
- https://github.com/sylabs/scs-library-client/commit/b5db2aacba6bf1231f42dd475cc32e6355ab47b2
- https://github.com/sylabs/scs-library-client/commit/eebd7caaab310b1fa803e55b8fc1acd9dcd2d00c
- https://github.com/sylabs/scs-library-client/security/advisories/GHSA-7p8m-22h4-9pj7
Frequently Asked Questions
What is CVE-2022-23538?
CVE-2022-23538 is a vulnerability in the Singularity Container Services (SCS) Container Library Service.
What is the severity of CVE-2022-23538?
CVE-2022-23538 has a severity rating of 7.6 (high).
Which software versions are affected by CVE-2022-23538?
Versions 1.3.2, 1.3.3, 1.4.0, and 1.4.1 of the Sylabs Singularity Container Services Library are affected by CVE-2022-23538.
How does CVE-2022-23538 affect the scs-library-client?
When the scs-library-client is used to pull a container image with authentication, it may send an incorrect HTTP Authorization header to the library service.
How can I fix CVE-2022-23538?
To fix CVE-2022-23538, update your Sylabs Singularity Container Services Library to a version that includes the necessary security patches.
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- vendor/sylabs
- canonical/sylabs singularity container services library
- version/sylabs singularity container services library/1.3.2
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- version/sylabs singularity container services library/1.4.1